Elastic and Inelastic Collisions Review

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What is the First Law of Motion?

Back

The First Law of Motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity unless acted upon by a net external force.

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What is mass?

Back

Mass is a measure of the amount of matter in an object, typically measured in kilograms (kg). It is a scalar quantity and does not change regardless of the object's location.

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What is momentum?

Back

Momentum is the product of an object's mass and its velocity. It is a vector quantity and is conserved in isolated systems during collisions.

Front

What is the law of conservation of momentum?

Back

The law of conservation of momentum states that the total momentum of a closed system remains constant if no external forces act on it.

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What happens to momentum in elastic collisions?

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In elastic collisions, both momentum and kinetic energy are conserved.

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What happens to momentum in inelastic collisions?

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In inelastic collisions, momentum is conserved, but kinetic energy is not conserved; some kinetic energy is transformed into other forms of energy.

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What is an example of an elastic collision?

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An example of an elastic collision is the collision between two billiard balls, where both momentum and kinetic energy are conserved.

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What is an example of an inelastic collision?

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An example of an inelastic collision is a car crash, where the cars crumple together and kinetic energy is transformed into sound and heat.

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How do you calculate momentum?

Back

Momentum (p) is calculated using the formula: p = mass (m) × velocity (v).

Front

What is the relationship between force and momentum?

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The relationship is given by the equation: Force = change in momentum / time. This means that a force applied over time changes the momentum of an object.